Implement queue (#11)

* Implement queue

* Enable queue by default, remove queue from web and update readme

* Rename useQueue to queuesRequests

* Rename queuesRequests and improve readme

* Rename _executeMethod and improve readme

* Rename to _isQueueEnabled

---------

Co-authored-by: Foti Dim <fdimanidis@gmail.com>

README.md

@@ -14,6 +14,8 @@ A cross-platform (Android/iOS/macOS/Windows/Linux/Web) Bluetooth Low Energy (BLE
 - [Reading & Writing data](#reading--writing-data)
 - [Pairing](#pairing)
 - [Bluetooth Availability](#bluetooth-availability)
+- [Command Queue](#command-queue)
+- [Timeout](#timeout)
 
 ### API Support Matrix
 
@@ -147,6 +149,28 @@ UniversalBle.onAvailabilityChange = (state) {
 UniversalBle.enableBluetooth();
 ```
 
+## Command Queue
+
+By default, all commands will be executed in a queue. Each command will wait for the previous one to finish.
+Some platforms (e.g. Android) will fail to send consecutive commands without any delay between them so it is a good idea to leave to queue enabled.
+
+```dart
+// Disable queue
+UniversalBle.queuesCommands = false;
+```
+
+## Timeout
+
+By default, all commands have a timeout of 10 seconds.
+
+```dart
+// Change timeout
+UniversalBle.timeout = const Duration(seconds: 10);
+
+// Disable timeout
+UniversalBle.timeout = null;
+```
+
 ## Platform-Specific Setup
 
 ### Android
@@ -191,7 +215,7 @@ UniversalBle.startScan(
 ```dart
 // Create a class that extends UniversalBlePlatform
 class UniversalBleMock extends UniversalBlePlatform {
-  // Implement all methods
+  // Implement all commands
 }
 
 UniversalBle.setInstance(UniversalBleMock());